1. Esther M. Friedman ( ) is a behavioral and social scientist at the RAND Corporation in Santa Monica, California.
2. Regina A. Shih is a senior behavioral and social scientist at the RAND Corporation.
3. Kenneth M. Langa is a professor of medicine and public health, a research professor at the Institute for Social Research, and a research investigator at the Ann Arbor Veterans Affairs Healthcare System, all at the University of Michigan, in Ann Arbor.
4. Michael D. Hurd is a senior principal researcher and director of the RAND Center for the Study of Aging at the RAND Corporation.